Metallic packing and packing-case for piston-rods.



No. 721,710. PATENTED MAR. 3-,1903.

' J. H. LEWIS &'L. G. KUNZER.

METALLIC PACKING AND PACKING CASE FOR PISTON RODS.

APPLICATION FILED NOV. 10, 1902.

H0 MODEL.

4 UNITED STATES PATENT OFFICE.

JOHNlL-"LEWIS AND tours c. KUNZER, or CHICAGO, ILLINOIS.

METALLIC PACKlNG AND PACKING-CASE FOR Pl STON-RODS.

SPECIFICATION forming part of Letters Patent No. 721,710, dated March 3, 1903. 7 Application filed November 10 1902 Serial No. 130,635. (No model.)

' States, residing'in Chicago, in the county'of Cook and State of Illinois, have invented a new and useful Improvement in Metallic of which the following isa specification.

metal packing and packing-glands for'pistonrods, the same being specially designed for use upon locomotives, although applicable to other purposes. I The object of our invention is to provide a piston-rod packing and packing-case of a simple, efficient, durable, and, economical construction which may be quickly and conveniently applied and which will automatically provide for wear and compression and prevent the escape of steam.

Our invention consists in the means we employ to practically ,accomplishrthis object or resultthat is to say, it consists, essentially, in connection'with the piston-rod and cylinder-head, of a dividedor two-part packinggland secured to the cylinder-head and provided with oneor more annular groovesor chambers to receive the packing and a me-. tallic packing comprising a plurality of segments, the meeting ends of which are halved, oifset, or notched in two planes transverseto each other, forming overlapping leaves and forming three transverse joints at the meeting endsof the segments, each extending only part Way through the packing and coming at different points of the circumference from and breaking joint with the others. One joint extends through the outer half or portion of the packing-ring, and the other two extend each only part way through the inner half or portion of the packing-ring.

Our invention also consists in the novel construction of parts and devices and in the novel combinations of parts and devices herein shownand described.

In the accompanying drawings, forming a part of. this specification, Figure 1 is a longitudinal vertical section of a device embodying our invention. on line2 2 of Fig. 1, showing also in dotted lines the'packing-gland. Fig. 3 is a detail elevation of the packing. Fig. 4 is a detail ing ends thereof.

Fig. 2 is a cross-section perspective view of one of the segments,

showing the double notches or notches in two planes transverse to each other at the meet- Fig. 5 is a detail view of the clamp-ring, and Figs. 6 and 7 are opposite end views of the packing. Packing and Packing-Cases for-Piston-Rods,

In said drawings, A represents a pistonlrod,'and B a portion of the cylinder-head Our invention relates to improvements in through which the piston-rod reciprocates.

'The cylinder-head B isfurnished with an opening or chamber 1) to receive the packing- ,gland and packing.

ducing a transverse joint extending across the whole width of the packing at the outer half or portion of its thickness. The inner leaf d is itself halved, notched, or ofiset transversely to the surface of the packingring, thus forming the interfitting tongues 01 61 the joints at the meeting ends and shoulders d 11 and d d of which extend each only half-wayacross the packing and only halfway through itsthickness and coming at different points from each other and also at different points from the transverse joint d d which extends through the outer half or portion of the packing, sothat all the transverse joints d d 61 (Z and d 61 break joints with each other. The packing is also provided with an exterior circumferential groove cl to receive the clamping spring or ring 0, which serves to hold the parts of the packing assembled or together.

F is the packing gland or collar, which is secured to the cylinder-head B by bolts F. This packing gland or collar is preferably divided or made in two parts for convenience of application around the piston-rod, especially. in cases where the piston-rod is formed with an enlargement a. The packing gland or collar F is'furnished with one or more interior annular grooves or recesses f to receive the, packing or packings D, the same being preferably provided with two of these annular grooves or recesses f, so that two packing-rings D may be employed. The packinggland F is provided with one or more, preferably four,small openings f for admitting steam into the annular grooves f, so that the steam-pressure will firmly compress the segments of the packing-ring around the piston and form a tight joint. In cases where the packing-gland is provided with two or more recessesfand two or more packing-rings D each succeeding packing-ring groove f is provided with steam-inlet openings f, so that the steam escaping through the preceding packing may enter and compress the succeeding packing, greater or less pressure being exerted upon the succeeding packing, according as more or less steam escapes through the preceding one. The segments or parts of the packing-gland F are secured together by boltsf A packing f of wire or other suitable material is interposed between the packing gland or collar F and the cylinder-head B. Space is left between the meeting end faces of the leaves (1 and shoulders (Z and tongues d and shoulders d and shoulders d and d to allow for wear and compression of the packing. The end (1 of the outer leaf (1 is provided with a tapering face (1, so that while leaving space for compression of the ring as a whole a tight joint may be formed between said end (1 and the shoulder (1 We claim- 1. The combination with a piston-rod and cylinder-head of a divided or two-part packing gland or collar secured to the cylinderhead and provided with a plurality of annular grooves or recesses having steam-inlets thereto, of a plurality of metallic packingrings each comprising a plurality of segments, the meeting ends of which are halved, olfset or notched in two planes transverse to each other forming inner and outer overlapping leaves, the innor circumferential leaves being themselves halved, offset or notched forming at each meeting end of the segments three transverse joints at different points of the circumference, one of which extends through only the outer half or portion of the packing-ring and the other two of which extend only part way through the inner half or portion of the packing-ring, and a clampring embracing the segmental packing-ring, substantially as specified.

2. The metallic packing for piston-rodscomprising a plurality of segments offset, halved or notched together at their meeting ends in two different planes or directions and forming three joints at different points of the circumference, one extending through the outer portion of the ring and the other two extending each only part way through the inner portion of the ring, substantially as specified.

3. A metallic piston-rod packing comprising a plurality of segments having each at their meeting ends double notches or offsets forming overlapping leaves and three joints at different points of the circumference, one of which extends only through the outer portion of the packing-ring and the other two of which extend each only part way through the inner portion of the packing-ring, substantially as specified.

4. A metallic packing comprising aplurality of segments having at their meeting ends double notches or offsets forming overlapping leaves and three joints at different points of the circumference, one of which extends only through one portion of the thickness of the packing-ring and the other two of the joints extend each only part Way through the other portion of the thickness of the packing-ring, substantially as specified.

5. A metallic packing comprising a plurality of segments having at their meeting ends double notches or offsets forming overlapping leaves and three joints at difierent points of the circumference, one of which extends only through one portion of the thickness of the packing-ring and the other two of the joints extend each only part way through the other portion of the thickness of the packing-ring, one of said overlapping leaves on each segment having a tapering or curved face, substantially as specified.

6. The combination with a piston-rod and cylinder-head of a gland secured to the cylinder-head and provided with an annular groove or recess, of a metallic packing-ring comprising a plurality of segments having each at their meeting ends double notches or offsets forming overlapping leaves and three joints at different points of the circumference, one of which extends only through the outer portion of the packing-ring and the other two of which extend only part way through the inner portion of the packing-ring, substantially as specified.

JOHN H. LEWIS. LOUIS G. KUNZER. Witnesses:

H. M. MUNDAY, EDMUND ADCOOK. 

